/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.arrow.memory;

/**
 * An allocation listener being notified for allocation/deallocation
 * <p>
 * It is expected to be called from multiple threads and as such,
 * provider should take care of making the implementation thread-safe
 */
public interface AllocationListener {

  public static final AllocationListener NOOP = new AllocationListener() {
    @Override
    public void onAllocation(long size) {
    }
  };

  /**
   * Called each time a new buffer is allocated
   *
   * @param size the buffer size being allocated
   */
  void onAllocation(long size);

}
